A matrix transform imager allowing high-fill factor

Author

Hasler, Paul ; Bandyopadhyay, Abhishek ; Smith, Paul

Author_Institution

Dept. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

Volume

3

fYear

2002

fDate

2002

Abstract

We present a transform imager that performs computation at the pixel plane, but still holds to a fill factor greater than 40 percent. This imager is capable of programmable matrix operations on the image, where we can represent the image as either a full matrix or using block matrix operations. Each pixel is composed of a photodiode sensor element and a multiplier. We present experimental data and results from a signal pixel, the resulting computation, and effect of mismatch and offsets through this circuit. We present the results of computing a DCT/DST transform, as well as frequency response characterizations related to these results.

Keywords

analogue processing circuits; discrete transforms; image processing equipment; image sensors; matrix algebra; real-time systems; DCT computations; DST computations; block matrix operations; frequency response characterizations; high-fill factor; matrix transform imager; mismatch; multiplier; offsets; photodiode sensor element; pixel plane computation; programmable matrix operations; Analog computers; Broadcasting; Circuits; Computer architecture; Concurrent computing; Discrete cosine transforms; Optical computing; Pixel; Streaming media; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on

Print_ISBN

0-7803-7448-7

Type

conf

DOI

10.1109/ISCAS.2002.1010229

Filename

1010229